1 /*
2 // Copyright (c) 2018 Intel Corporation
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //      http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 */
16 
17 #include "channel_mgmt.hpp"
18 
19 #include "apphandler.hpp"
20 #include "user_layer.hpp"
21 
22 #include <ifaddrs.h>
23 #include <sys/stat.h>
24 #include <sys/types.h>
25 #include <unistd.h>
26 
27 #include <boost/interprocess/sync/scoped_lock.hpp>
28 #include <phosphor-logging/log.hpp>
29 #include <sdbusplus/bus/match.hpp>
30 #include <sdbusplus/server/object.hpp>
31 
32 #include <cerrno>
33 #include <exception>
34 #include <filesystem>
35 #include <fstream>
36 #include <unordered_map>
37 
38 namespace ipmi
39 {
40 
41 using namespace phosphor::logging;
42 
43 static constexpr const char* channelAccessDefaultFilename =
44     "/usr/share/ipmi-providers/channel_access.json";
45 static constexpr const char* channelConfigDefaultFilename =
46     "/usr/share/ipmi-providers/channel_config.json";
47 static constexpr const char* channelNvDataFilename =
48     "/var/lib/ipmi/channel_access_nv.json";
49 static constexpr const char* channelVolatileDataFilename =
50     "/run/ipmi/channel_access_volatile.json";
51 
52 // TODO: Get the service name dynamically..
53 static constexpr const char* networkIntfServiceName =
54     "xyz.openbmc_project.Network";
55 static constexpr const char* networkIntfObjectBasePath =
56     "/xyz/openbmc_project/network";
57 static constexpr const char* networkChConfigIntfName =
58     "xyz.openbmc_project.Channel.ChannelAccess";
59 static constexpr const char* privilegePropertyString = "MaxPrivilege";
60 static constexpr const char* dBusPropertiesInterface =
61     "org.freedesktop.DBus.Properties";
62 static constexpr const char* propertiesChangedSignal = "PropertiesChanged";
63 static constexpr const char* interfaceAddedSignal = "InterfacesAdded";
64 static constexpr const char* interfaceRemovedSignal = "InterfacesRemoved";
65 
66 // STRING DEFINES: Should sync with key's in JSON
67 static constexpr const char* nameString = "name";
68 static constexpr const char* isValidString = "is_valid";
69 static constexpr const char* activeSessionsString = "active_sessions";
70 static constexpr const char* maxTransferSizeString = "max_transfer_size";
71 static constexpr const char* channelInfoString = "channel_info";
72 static constexpr const char* mediumTypeString = "medium_type";
73 static constexpr const char* protocolTypeString = "protocol_type";
74 static constexpr const char* sessionSupportedString = "session_supported";
75 static constexpr const char* isIpmiString = "is_ipmi";
76 static constexpr const char* isManagementNIC = "is_management_nic";
77 static constexpr const char* authTypeSupportedString = "auth_type_supported";
78 static constexpr const char* accessModeString = "access_mode";
79 static constexpr const char* userAuthDisabledString = "user_auth_disabled";
80 static constexpr const char* perMsgAuthDisabledString = "per_msg_auth_disabled";
81 static constexpr const char* alertingDisabledString = "alerting_disabled";
82 static constexpr const char* privLimitString = "priv_limit";
83 static constexpr const char* authTypeEnabledString = "auth_type_enabled";
84 
85 // Default values
86 static constexpr const char* defaultChannelName = "RESERVED";
87 static constexpr const uint8_t defaultMediumType =
88     static_cast<uint8_t>(EChannelMediumType::reserved);
89 static constexpr const uint8_t defaultProtocolType =
90     static_cast<uint8_t>(EChannelProtocolType::reserved);
91 static constexpr const uint8_t defaultSessionSupported =
92     static_cast<uint8_t>(EChannelSessSupported::none);
93 static constexpr const uint8_t defaultAuthType =
94     static_cast<uint8_t>(EAuthType::none);
95 static constexpr const bool defaultIsIpmiState = false;
96 static constexpr size_t smallChannelSize = 64;
97 
98 std::unique_ptr<sdbusplus::bus::match_t> chPropertiesSignal
99     __attribute__((init_priority(101)));
100 
101 std::unique_ptr<sdbusplus::bus::match_t> chInterfaceAddedSignal
102     __attribute__((init_priority(101)));
103 
104 std::unique_ptr<sdbusplus::bus::match_t> chInterfaceRemovedSignal
105     __attribute__((init_priority(101)));
106 
107 // String mappings use in JSON config file
108 static std::unordered_map<std::string, EChannelMediumType> mediumTypeMap = {
109     {"reserved", EChannelMediumType::reserved},
110     {"ipmb", EChannelMediumType::ipmb},
111     {"icmb-v1.0", EChannelMediumType::icmbV10},
112     {"icmb-v0.9", EChannelMediumType::icmbV09},
113     {"lan-802.3", EChannelMediumType::lan8032},
114     {"serial", EChannelMediumType::serial},
115     {"other-lan", EChannelMediumType::otherLan},
116     {"pci-smbus", EChannelMediumType::pciSmbus},
117     {"smbus-v1.0", EChannelMediumType::smbusV11},
118     {"smbus-v2.0", EChannelMediumType::smbusV20},
119     {"usb-1x", EChannelMediumType::usbV1x},
120     {"usb-2x", EChannelMediumType::usbV2x},
121     {"system-interface", EChannelMediumType::systemInterface},
122     {"oem", EChannelMediumType::oem},
123     {"unknown", EChannelMediumType::unknown}};
124 
125 static std::unordered_map<EInterfaceIndex, std::string> interfaceMap = {
126     {interfaceKCS, "SMS"},
127     {interfaceLAN1, "eth0"},
128     {interfaceUnknown, "unknown"}};
129 
130 static std::unordered_map<std::string, EChannelProtocolType> protocolTypeMap = {
131     {"na", EChannelProtocolType::na},
132     {"ipmb-1.0", EChannelProtocolType::ipmbV10},
133     {"icmb-2.0", EChannelProtocolType::icmbV11},
134     {"reserved", EChannelProtocolType::reserved},
135     {"ipmi-smbus", EChannelProtocolType::ipmiSmbus},
136     {"kcs", EChannelProtocolType::kcs},
137     {"smic", EChannelProtocolType::smic},
138     {"bt-10", EChannelProtocolType::bt10},
139     {"bt-15", EChannelProtocolType::bt15},
140     {"tmode", EChannelProtocolType::tMode},
141     {"oem", EChannelProtocolType::oem}};
142 
143 static std::array<std::string, 4> accessModeList = {
144     "disabled", "pre-boot", "always_available", "shared"};
145 
146 static std::array<std::string, 4> sessionSupportList = {
147     "session-less", "single-session", "multi-session", "session-based"};
148 
149 const std::array<std::string, PRIVILEGE_OEM + 1> privList = {
150     "priv-reserved", "priv-callback", "priv-user",
151     "priv-operator", "priv-admin",    "priv-oem"};
152 
153 std::string ChannelConfig::getChannelName(const uint8_t chNum)
154 {
155     if (!isValidChannel(chNum))
156     {
157         log<level::ERR>("Invalid channel number.",
158                         entry("CHANNEL_ID=%d", chNum));
159         throw std::invalid_argument("Invalid channel number");
160     }
161 
162     return channelData[chNum].chName;
163 }
164 
165 int ChannelConfig::convertToChannelNumberFromChannelName(
166     const std::string& chName)
167 {
168     for (const auto& it : channelData)
169     {
170         if (it.chName == chName)
171         {
172             return it.chID;
173         }
174     }
175     log<level::ERR>("Invalid channel name.",
176                     entry("CHANNEL=%s", chName.c_str()));
177     throw std::invalid_argument("Invalid channel name");
178 
179     return -1;
180 }
181 
182 std::string ChannelConfig::getChannelNameFromPath(const std::string& path)
183 {
184     constexpr size_t length = strlen(networkIntfObjectBasePath);
185     if (((length + 1) >= path.size()) ||
186         path.compare(0, length, networkIntfObjectBasePath))
187     {
188         log<level::ERR>("Invalid object path.", entry("PATH=%s", path.c_str()));
189         throw std::invalid_argument("Invalid object path");
190     }
191     std::string chName(path, length + 1);
192     return chName;
193 }
194 
195 void ChannelConfig::processChAccessPropChange(
196     const std::string& path, const DbusChObjProperties& chProperties)
197 {
198     // Get interface name from path. ex: '/xyz/openbmc_project/network/eth0'
199     std::string chName;
200     try
201     {
202         chName = getChannelNameFromPath(path);
203     }
204     catch (const std::invalid_argument& e)
205     {
206         log<level::ERR>("Exception: ", entry("MSG=%s", e.what()));
207         return;
208     }
209 
210     // Get the MaxPrivilege property value from the signal
211     std::string intfPrivStr;
212     std::string propName;
213     for (const auto& prop : chProperties)
214     {
215         if (prop.first == privilegePropertyString)
216         {
217             propName = privilegePropertyString;
218             intfPrivStr = std::get<std::string>(prop.second);
219             break;
220         }
221     }
222 
223     if (propName != privilegePropertyString)
224     {
225         log<level::ERR>("Unknown signal caught.");
226         return;
227     }
228 
229     if (intfPrivStr.empty())
230     {
231         log<level::ERR>("Invalid privilege string.",
232                         entry("INTF=%s", chName.c_str()));
233         return;
234     }
235 
236     uint8_t intfPriv = 0;
237     int chNum;
238     try
239     {
240         intfPriv = static_cast<uint8_t>(convertToPrivLimitIndex(intfPrivStr));
241         chNum = convertToChannelNumberFromChannelName(chName);
242     }
243     catch (const std::invalid_argument& e)
244     {
245         log<level::ERR>("Exception: ", entry("MSG=%s", e.what()));
246         return;
247     }
248 
249     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
250         channelLock{*channelMutex};
251     // skip updating the values, if this property change originated from IPMI.
252     if (signalFlag & (1 << chNum))
253     {
254         signalFlag &= ~(1 << chNum);
255         log<level::DEBUG>("Request originated from IPMI so ignoring signal");
256         return;
257     }
258 
259     // Update both volatile & Non-volatile, if there is mismatch.
260     // as property change other than IPMI, has to update both volatile &
261     // non-volatile data.
262     checkAndReloadVolatileData();
263     checkAndReloadNVData();
264     if (channelData[chNum].chAccess.chNonVolatileData.privLimit != intfPriv)
265     {
266         // Update NV data
267         channelData[chNum].chAccess.chNonVolatileData.privLimit = intfPriv;
268         if (writeChannelPersistData() != 0)
269         {
270             log<level::ERR>("Failed to update the persist data file");
271             return;
272         }
273 
274         // Update Volatile data
275         if (channelData[chNum].chAccess.chVolatileData.privLimit != intfPriv)
276         {
277             channelData[chNum].chAccess.chVolatileData.privLimit = intfPriv;
278             if (writeChannelVolatileData() != 0)
279             {
280                 log<level::ERR>("Failed to update the volatile data file");
281                 return;
282             }
283         }
284     }
285 
286     return;
287 }
288 
289 ChannelConfig& getChannelConfigObject()
290 {
291     static ChannelConfig channelConfig;
292     return channelConfig;
293 }
294 
295 ChannelConfig::~ChannelConfig()
296 {
297     if (signalHndlrObjectState)
298     {
299         chPropertiesSignal.reset();
300         chInterfaceAddedSignal.reset();
301         chInterfaceRemovedSignal.reset();
302         sigHndlrLock.unlock();
303     }
304 }
305 
306 ChannelConfig::ChannelConfig() : bus(ipmid_get_sd_bus_connection())
307 {
308     std::ofstream mutexCleanUpFile;
309     mutexCleanUpFile.open(ipmiChMutexCleanupLockFile,
310                           std::ofstream::out | std::ofstream::app);
311     if (!mutexCleanUpFile.good())
312     {
313         log<level::DEBUG>("Unable to open mutex cleanup file");
314         return;
315     }
316     mutexCleanUpFile.close();
317     mutexCleanupLock =
318         boost::interprocess::file_lock(ipmiChMutexCleanupLockFile);
319     if (mutexCleanupLock.try_lock())
320     {
321         boost::interprocess::named_recursive_mutex::remove(ipmiChannelMutex);
322         channelMutex =
323             std::make_unique<boost::interprocess::named_recursive_mutex>(
324                 boost::interprocess::open_or_create, ipmiChannelMutex);
325         mutexCleanupLock.lock_sharable();
326     }
327     else
328     {
329         mutexCleanupLock.lock_sharable();
330         channelMutex =
331             std::make_unique<boost::interprocess::named_recursive_mutex>(
332                 boost::interprocess::open_or_create, ipmiChannelMutex);
333     }
334 
335     initChannelPersistData();
336 
337     sigHndlrLock = boost::interprocess::file_lock(channelNvDataFilename);
338     // Register it for single object and single process either netipmid /
339     // host-ipmid
340     if (chPropertiesSignal == nullptr && sigHndlrLock.try_lock())
341     {
342         log<level::DEBUG>("Registering channel signal handler.");
343         chPropertiesSignal = std::make_unique<sdbusplus::bus::match_t>(
344             bus,
345             sdbusplus::bus::match::rules::path_namespace(
346                 networkIntfObjectBasePath) +
347                 sdbusplus::bus::match::rules::type::signal() +
348                 sdbusplus::bus::match::rules::member(propertiesChangedSignal) +
349                 sdbusplus::bus::match::rules::interface(
350                     dBusPropertiesInterface) +
351                 sdbusplus::bus::match::rules::argN(0, networkChConfigIntfName),
352             [&](sdbusplus::message_t& msg) {
353             DbusChObjProperties props;
354             std::string iface;
355             std::string path = msg.get_path();
356             msg.read(iface, props);
357             processChAccessPropChange(path, props);
358             });
359         signalHndlrObjectState = true;
360 
361         chInterfaceAddedSignal = std::make_unique<sdbusplus::bus::match_t>(
362             bus,
363             sdbusplus::bus::match::rules::type::signal() +
364                 sdbusplus::bus::match::rules::member(interfaceAddedSignal) +
365                 sdbusplus::bus::match::rules::argNpath(
366                     0, std::string(networkIntfObjectBasePath) + "/"),
367             [&](sdbusplus::message_t&) { initChannelPersistData(); });
368 
369         chInterfaceRemovedSignal = std::make_unique<sdbusplus::bus::match_t>(
370             bus,
371             sdbusplus::bus::match::rules::type::signal() +
372                 sdbusplus::bus::match::rules::member(interfaceRemovedSignal) +
373                 sdbusplus::bus::match::rules::argNpath(
374                     0, std::string(networkIntfObjectBasePath) + "/"),
375             [&](sdbusplus::message_t&) { initChannelPersistData(); });
376     }
377 }
378 
379 bool ChannelConfig::isValidChannel(const uint8_t chNum)
380 {
381     if (chNum >= maxIpmiChannels)
382     {
383         log<level::DEBUG>("Invalid channel ID - Out of range");
384         return false;
385     }
386 
387     if (channelData[chNum].isChValid == false)
388     {
389         log<level::DEBUG>("Channel is not valid");
390     }
391 
392     return channelData[chNum].isChValid;
393 }
394 
395 EChannelSessSupported
396     ChannelConfig::getChannelSessionSupport(const uint8_t chNum)
397 {
398     EChannelSessSupported chSessSupport =
399         (EChannelSessSupported)channelData[chNum].chInfo.sessionSupported;
400     return chSessSupport;
401 }
402 
403 bool ChannelConfig::isValidAuthType(const uint8_t chNum,
404                                     const EAuthType& authType)
405 {
406     if ((authType < EAuthType::md2) || (authType > EAuthType::oem))
407     {
408         log<level::DEBUG>("Invalid authentication type");
409         return false;
410     }
411 
412     uint8_t authTypeSupported = channelData[chNum].chInfo.authTypeSupported;
413     if (!(authTypeSupported & (1 << static_cast<uint8_t>(authType))))
414     {
415         log<level::DEBUG>("Authentication type is not supported.");
416         return false;
417     }
418 
419     return true;
420 }
421 
422 int ChannelConfig::getChannelActiveSessions(const uint8_t chNum)
423 {
424     // TODO: TEMPORARY FIX
425     // Channels active session count is managed separately
426     // by monitoring channel session which includes LAN and
427     // RAKP layer changes. This will be updated, once the
428     // authentication part is implemented.
429     return channelData[chNum].activeSessCount;
430 }
431 
432 size_t ChannelConfig::getChannelMaxTransferSize(uint8_t chNum)
433 {
434     return channelData[chNum].maxTransferSize;
435 }
436 
437 Cc ChannelConfig::getChannelInfo(const uint8_t chNum, ChannelInfo& chInfo)
438 {
439     if (!isValidChannel(chNum))
440     {
441         log<level::DEBUG>("Invalid channel");
442         return ccInvalidFieldRequest;
443     }
444 
445     std::copy_n(reinterpret_cast<uint8_t*>(&channelData[chNum].chInfo),
446                 sizeof(channelData[chNum].chInfo),
447                 reinterpret_cast<uint8_t*>(&chInfo));
448     return ccSuccess;
449 }
450 
451 Cc ChannelConfig::getChannelAccessData(const uint8_t chNum,
452                                        ChannelAccess& chAccessData)
453 {
454     if (!isValidChannel(chNum))
455     {
456         log<level::DEBUG>("Invalid channel");
457         return ccInvalidFieldRequest;
458     }
459 
460     if (getChannelSessionSupport(chNum) == EChannelSessSupported::none)
461     {
462         log<level::DEBUG>("Session-less channel doesn't have access data.");
463         return ccActionNotSupportedForChannel;
464     }
465 
466     if (checkAndReloadVolatileData() != 0)
467     {
468         return ccUnspecifiedError;
469     }
470 
471     std::copy_n(
472         reinterpret_cast<uint8_t*>(&channelData[chNum].chAccess.chVolatileData),
473         sizeof(channelData[chNum].chAccess.chVolatileData),
474         reinterpret_cast<uint8_t*>(&chAccessData));
475 
476     return ccSuccess;
477 }
478 
479 Cc ChannelConfig::setChannelAccessData(const uint8_t chNum,
480                                        const ChannelAccess& chAccessData,
481                                        const uint8_t setFlag)
482 {
483     if (!isValidChannel(chNum))
484     {
485         log<level::DEBUG>("Invalid channel");
486         return ccInvalidFieldRequest;
487     }
488 
489     if (getChannelSessionSupport(chNum) == EChannelSessSupported::none)
490     {
491         log<level::DEBUG>("Session-less channel doesn't have access data.");
492         return ccActionNotSupportedForChannel;
493     }
494 
495     if ((setFlag & setAccessMode) &&
496         (!isValidAccessMode(chAccessData.accessMode)))
497     {
498         log<level::DEBUG>("Invalid access mode specified");
499         return ccAccessModeNotSupportedForChannel;
500     }
501     if ((setFlag & setPrivLimit) && (!isValidPrivLimit(chAccessData.privLimit)))
502     {
503         log<level::DEBUG>("Invalid privilege limit specified");
504         return ccInvalidFieldRequest;
505     }
506 
507     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
508         channelLock{*channelMutex};
509 
510     if (checkAndReloadVolatileData() != 0)
511     {
512         return ccUnspecifiedError;
513     }
514 
515     if (setFlag & setAccessMode)
516     {
517         channelData[chNum].chAccess.chVolatileData.accessMode =
518             chAccessData.accessMode;
519     }
520     if (setFlag & setUserAuthEnabled)
521     {
522         channelData[chNum].chAccess.chVolatileData.userAuthDisabled =
523             chAccessData.userAuthDisabled;
524     }
525     if (setFlag & setMsgAuthEnabled)
526     {
527         channelData[chNum].chAccess.chVolatileData.perMsgAuthDisabled =
528             chAccessData.perMsgAuthDisabled;
529     }
530     if (setFlag & setAlertingEnabled)
531     {
532         channelData[chNum].chAccess.chVolatileData.alertingDisabled =
533             chAccessData.alertingDisabled;
534     }
535     if (setFlag & setPrivLimit)
536     {
537         channelData[chNum].chAccess.chVolatileData.privLimit =
538             chAccessData.privLimit;
539     }
540 
541     // Write Volatile data to file
542     if (writeChannelVolatileData() != 0)
543     {
544         log<level::DEBUG>("Failed to update the channel volatile data");
545         return ccUnspecifiedError;
546     }
547     return ccSuccess;
548 }
549 
550 Cc ChannelConfig::getChannelAccessPersistData(const uint8_t chNum,
551                                               ChannelAccess& chAccessData)
552 {
553     if (!isValidChannel(chNum))
554     {
555         log<level::DEBUG>("Invalid channel");
556         return ccInvalidFieldRequest;
557     }
558 
559     if (getChannelSessionSupport(chNum) == EChannelSessSupported::none)
560     {
561         log<level::DEBUG>("Session-less channel doesn't have access data.");
562         return ccActionNotSupportedForChannel;
563     }
564 
565     if (checkAndReloadNVData() != 0)
566     {
567         return ccUnspecifiedError;
568     }
569 
570     std::copy_n(reinterpret_cast<uint8_t*>(
571                     &channelData[chNum].chAccess.chNonVolatileData),
572                 sizeof(channelData[chNum].chAccess.chNonVolatileData),
573                 reinterpret_cast<uint8_t*>(&chAccessData));
574 
575     return ccSuccess;
576 }
577 
578 Cc ChannelConfig::setChannelAccessPersistData(const uint8_t chNum,
579                                               const ChannelAccess& chAccessData,
580                                               const uint8_t setFlag)
581 {
582     if (!isValidChannel(chNum))
583     {
584         log<level::DEBUG>("Invalid channel");
585         return ccInvalidFieldRequest;
586     }
587 
588     if (getChannelSessionSupport(chNum) == EChannelSessSupported::none)
589     {
590         log<level::DEBUG>("Session-less channel doesn't have access data.");
591         return ccActionNotSupportedForChannel;
592     }
593 
594     if ((setFlag & setAccessMode) &&
595         (!isValidAccessMode(chAccessData.accessMode)))
596     {
597         log<level::DEBUG>("Invalid access mode specified");
598         return ccAccessModeNotSupportedForChannel;
599     }
600     if ((setFlag & setPrivLimit) && (!isValidPrivLimit(chAccessData.privLimit)))
601     {
602         log<level::DEBUG>("Invalid privilege limit specified");
603         return ccInvalidFieldRequest;
604     }
605 
606     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
607         channelLock{*channelMutex};
608 
609     if (checkAndReloadNVData() != 0)
610     {
611         return ccUnspecifiedError;
612     }
613 
614     if (setFlag & setAccessMode)
615     {
616         channelData[chNum].chAccess.chNonVolatileData.accessMode =
617             chAccessData.accessMode;
618     }
619     if (setFlag & setUserAuthEnabled)
620     {
621         channelData[chNum].chAccess.chNonVolatileData.userAuthDisabled =
622             chAccessData.userAuthDisabled;
623     }
624     if (setFlag & setMsgAuthEnabled)
625     {
626         channelData[chNum].chAccess.chNonVolatileData.perMsgAuthDisabled =
627             chAccessData.perMsgAuthDisabled;
628     }
629     if (setFlag & setAlertingEnabled)
630     {
631         channelData[chNum].chAccess.chNonVolatileData.alertingDisabled =
632             chAccessData.alertingDisabled;
633     }
634     if (setFlag & setPrivLimit)
635     {
636         // Send Update to network channel config interfaces over dbus
637         std::string privStr = convertToPrivLimitString(chAccessData.privLimit);
638         std::string networkIntfObj = std::string(networkIntfObjectBasePath) +
639                                      "/" + channelData[chNum].chName;
640         try
641         {
642             if (0 != setDbusProperty(networkIntfServiceName, networkIntfObj,
643                                      networkChConfigIntfName,
644                                      privilegePropertyString, privStr))
645             {
646                 log<level::DEBUG>(
647                     "Network interface does not exist",
648                     entry("INTERFACE=%s", channelData[chNum].chName.c_str()));
649                 return ccUnspecifiedError;
650             }
651         }
652         catch (const sdbusplus::exception_t& e)
653         {
654             log<level::ERR>("Exception: Network interface does not exist");
655             return ccInvalidFieldRequest;
656         }
657         signalFlag |= (1 << chNum);
658         channelData[chNum].chAccess.chNonVolatileData.privLimit =
659             chAccessData.privLimit;
660     }
661 
662     // Write persistent data to file
663     if (writeChannelPersistData() != 0)
664     {
665         log<level::DEBUG>("Failed to update the presist data file");
666         return ccUnspecifiedError;
667     }
668     return ccSuccess;
669 }
670 
671 Cc ChannelConfig::getChannelAuthTypeSupported(const uint8_t chNum,
672                                               uint8_t& authTypeSupported)
673 {
674     if (!isValidChannel(chNum))
675     {
676         log<level::DEBUG>("Invalid channel");
677         return ccInvalidFieldRequest;
678     }
679 
680     authTypeSupported = channelData[chNum].chInfo.authTypeSupported;
681     return ccSuccess;
682 }
683 
684 Cc ChannelConfig::getChannelEnabledAuthType(const uint8_t chNum,
685                                             const uint8_t priv,
686                                             EAuthType& authType)
687 {
688     if (!isValidChannel(chNum))
689     {
690         log<level::DEBUG>("Invalid channel");
691         return ccInvalidFieldRequest;
692     }
693 
694     if (getChannelSessionSupport(chNum) == EChannelSessSupported::none)
695     {
696         log<level::DEBUG>("Sessionless channel doesn't have access data.");
697         return ccInvalidFieldRequest;
698     }
699 
700     if (!isValidPrivLimit(priv))
701     {
702         log<level::DEBUG>("Invalid privilege specified.");
703         return ccInvalidFieldRequest;
704     }
705 
706     // TODO: Hardcoded for now. Need to implement.
707     authType = EAuthType::none;
708 
709     return ccSuccess;
710 }
711 
712 std::time_t ChannelConfig::getUpdatedFileTime(const std::string& fileName)
713 {
714     struct stat fileStat;
715     if (stat(fileName.c_str(), &fileStat) != 0)
716     {
717         log<level::DEBUG>("Error in getting last updated time stamp");
718         return -EIO;
719     }
720     return fileStat.st_mtime;
721 }
722 
723 EChannelAccessMode
724     ChannelConfig::convertToAccessModeIndex(const std::string& mode)
725 {
726     auto iter = std::find(accessModeList.begin(), accessModeList.end(), mode);
727     if (iter == accessModeList.end())
728     {
729         log<level::ERR>("Invalid access mode.",
730                         entry("MODE_STR=%s", mode.c_str()));
731         throw std::invalid_argument("Invalid access mode.");
732     }
733 
734     return static_cast<EChannelAccessMode>(
735         std::distance(accessModeList.begin(), iter));
736 }
737 
738 std::string ChannelConfig::convertToAccessModeString(const uint8_t value)
739 {
740     if (accessModeList.size() <= value)
741     {
742         log<level::ERR>("Invalid access mode.", entry("MODE_IDX=%d", value));
743         throw std::invalid_argument("Invalid access mode.");
744     }
745 
746     return accessModeList.at(value);
747 }
748 
749 CommandPrivilege
750     ChannelConfig::convertToPrivLimitIndex(const std::string& value)
751 {
752     auto iter = std::find(privList.begin(), privList.end(), value);
753     if (iter == privList.end())
754     {
755         log<level::ERR>("Invalid privilege.",
756                         entry("PRIV_STR=%s", value.c_str()));
757         throw std::invalid_argument("Invalid privilege.");
758     }
759 
760     return static_cast<CommandPrivilege>(std::distance(privList.begin(), iter));
761 }
762 
763 std::string ChannelConfig::convertToPrivLimitString(const uint8_t value)
764 {
765     if (privList.size() <= value)
766     {
767         log<level::ERR>("Invalid privilege.", entry("PRIV_IDX=%d", value));
768         throw std::invalid_argument("Invalid privilege.");
769     }
770 
771     return privList.at(value);
772 }
773 
774 EChannelSessSupported
775     ChannelConfig::convertToSessionSupportIndex(const std::string& value)
776 {
777     auto iter = std::find(sessionSupportList.begin(), sessionSupportList.end(),
778                           value);
779     if (iter == sessionSupportList.end())
780     {
781         log<level::ERR>("Invalid session supported.",
782                         entry("SESS_STR=%s", value.c_str()));
783         throw std::invalid_argument("Invalid session supported.");
784     }
785 
786     return static_cast<EChannelSessSupported>(
787         std::distance(sessionSupportList.begin(), iter));
788 }
789 
790 EChannelMediumType
791     ChannelConfig::convertToMediumTypeIndex(const std::string& value)
792 {
793     std::unordered_map<std::string, EChannelMediumType>::iterator it =
794         mediumTypeMap.find(value);
795     if (it == mediumTypeMap.end())
796     {
797         log<level::ERR>("Invalid medium type.",
798                         entry("MEDIUM_STR=%s", value.c_str()));
799         throw std::invalid_argument("Invalid medium type.");
800     }
801 
802     return static_cast<EChannelMediumType>(it->second);
803 }
804 
805 EChannelProtocolType
806     ChannelConfig::convertToProtocolTypeIndex(const std::string& value)
807 {
808     std::unordered_map<std::string, EChannelProtocolType>::iterator it =
809         protocolTypeMap.find(value);
810     if (it == protocolTypeMap.end())
811     {
812         log<level::ERR>("Invalid protocol type.",
813                         entry("PROTO_STR=%s", value.c_str()));
814         throw std::invalid_argument("Invalid protocol type.");
815     }
816 
817     return static_cast<EChannelProtocolType>(it->second);
818 }
819 
820 Json ChannelConfig::readJsonFile(const std::string& configFile)
821 {
822     std::ifstream jsonFile(configFile);
823     if (!jsonFile.good())
824     {
825         log<level::INFO>("JSON file not found",
826                          entry("FILE_NAME=%s", configFile.c_str()));
827         return nullptr;
828     }
829 
830     Json data = nullptr;
831     try
832     {
833         data = Json::parse(jsonFile, nullptr, false);
834     }
835     catch (const Json::parse_error& e)
836     {
837         log<level::DEBUG>("Corrupted channel config.",
838                           entry("MSG=%s", e.what()));
839         throw std::runtime_error("Corrupted channel config file");
840     }
841 
842     return data;
843 }
844 
845 int ChannelConfig::writeJsonFile(const std::string& configFile,
846                                  const Json& jsonData)
847 {
848     const std::string tmpFile = configFile + "_tmp";
849     int fd = open(tmpFile.c_str(), O_CREAT | O_WRONLY | O_TRUNC | O_SYNC,
850                   S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
851     if (fd < 0)
852     {
853         log<level::ERR>("Error in creating json file",
854                         entry("FILE_NAME = %s", tmpFile.c_str()));
855         return -EIO;
856     }
857     const auto& writeData = jsonData.dump();
858     if (write(fd, writeData.c_str(), writeData.size()) !=
859         static_cast<ssize_t>(writeData.size()))
860     {
861         close(fd);
862         log<level::ERR>("Error in writing configuration file",
863                         entry("FILE_NAME = %s", tmpFile.c_str()));
864         return -EIO;
865     }
866     close(fd);
867 
868     if (std::rename(tmpFile.c_str(), configFile.c_str()) != 0)
869     {
870         log<level::ERR>("Error in renaming temporary data file",
871                         entry("FILE_NAME = %s", tmpFile.c_str()));
872         return -EIO;
873     }
874 
875     return 0;
876 }
877 
878 void ChannelConfig::setDefaultChannelConfig(const uint8_t chNum,
879                                             const std::string& chName)
880 {
881     channelData[chNum].chName = chName;
882     channelData[chNum].chID = chNum;
883     channelData[chNum].isChValid = false;
884     channelData[chNum].activeSessCount = 0;
885     channelData[chNum].isManagementNIC = false;
886 
887     channelData[chNum].chInfo.mediumType = defaultMediumType;
888     channelData[chNum].chInfo.protocolType = defaultProtocolType;
889     channelData[chNum].chInfo.sessionSupported = defaultSessionSupported;
890     channelData[chNum].chInfo.isIpmi = defaultIsIpmiState;
891     channelData[chNum].chInfo.authTypeSupported = defaultAuthType;
892 }
893 
894 uint8_t ChannelConfig::getManagementNICID()
895 {
896     static bool idFound = false;
897     static uint8_t id = 0;
898 
899     if (idFound)
900     {
901         return id;
902     }
903 
904     for (uint8_t chIdx = 0; chIdx < maxIpmiChannels; chIdx++)
905     {
906         if (channelData[chIdx].isManagementNIC)
907         {
908             id = chIdx;
909             idFound = true;
910             break;
911         }
912     }
913 
914     if (!idFound)
915     {
916         id = static_cast<uint8_t>(EChannelID::chanLan1);
917         idFound = true;
918     }
919     return id;
920 }
921 
922 int ChannelConfig::loadChannelConfig()
923 {
924     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
925         channelLock{*channelMutex};
926 
927     Json data = readJsonFile(channelConfigDefaultFilename);
928     if (data.empty())
929     {
930         log<level::DEBUG>("Error in opening IPMI Channel data file");
931         return -EIO;
932     }
933 
934     channelData.fill(ChannelProperties{});
935 
936     // Collect the list of NIC interfaces connected to the BMC. Use this
937     // information to only add IPMI channels that have active NIC interfaces.
938     struct ifaddrs *ifaddr = nullptr, *ifa = nullptr;
939     if (int err = getifaddrs(&ifaddr); err < 0)
940     {
941         log<level::DEBUG>("Unable to acquire network interfaces");
942         return -EIO;
943     }
944 
945     for (int chNum = 0; chNum < maxIpmiChannels; chNum++)
946     {
947         try
948         {
949             std::string chKey = std::to_string(chNum);
950             Json jsonChData = data[chKey].get<Json>();
951             if (jsonChData.is_null())
952             {
953                 // If user didn't want to configure specific channel (say
954                 // reserved channel), then load that index with default values.
955                 setDefaultChannelConfig(chNum, defaultChannelName);
956                 continue;
957             }
958             Json jsonChInfo = jsonChData[channelInfoString].get<Json>();
959             if (jsonChInfo.is_null())
960             {
961                 log<level::ERR>("Invalid/corrupted channel config file");
962                 freeifaddrs(ifaddr);
963                 return -EBADMSG;
964             }
965 
966             bool channelFound = true;
967             // Confirm the LAN channel is present
968             if (jsonChInfo[mediumTypeString].get<std::string>() == "lan-802.3")
969             {
970                 channelFound = false;
971                 for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)
972                 {
973                     if (jsonChData[nameString].get<std::string>() ==
974                         ifa->ifa_name)
975                     {
976                         channelFound = true;
977                         break;
978                     }
979                 }
980             }
981             ChannelProperties& chData = channelData[chNum];
982             chData.chID = chNum;
983             chData.chName = jsonChData[nameString].get<std::string>();
984             chData.isChValid = channelFound &&
985                                jsonChData[isValidString].get<bool>();
986             chData.activeSessCount = jsonChData.value(activeSessionsString, 0);
987             chData.maxTransferSize = jsonChData.value(maxTransferSizeString,
988                                                       smallChannelSize);
989             if (jsonChData.count(isManagementNIC) != 0)
990             {
991                 chData.isManagementNIC =
992                     jsonChData[isManagementNIC].get<bool>();
993             }
994 
995             std::string medTypeStr =
996                 jsonChInfo[mediumTypeString].get<std::string>();
997             chData.chInfo.mediumType =
998                 static_cast<uint8_t>(convertToMediumTypeIndex(medTypeStr));
999             std::string protoTypeStr =
1000                 jsonChInfo[protocolTypeString].get<std::string>();
1001             chData.chInfo.protocolType =
1002                 static_cast<uint8_t>(convertToProtocolTypeIndex(protoTypeStr));
1003             std::string sessStr =
1004                 jsonChInfo[sessionSupportedString].get<std::string>();
1005             chData.chInfo.sessionSupported =
1006                 static_cast<uint8_t>(convertToSessionSupportIndex(sessStr));
1007             chData.chInfo.isIpmi = jsonChInfo[isIpmiString].get<bool>();
1008             chData.chInfo.authTypeSupported = defaultAuthType;
1009         }
1010         catch (const Json::exception& e)
1011         {
1012             log<level::DEBUG>("Json Exception caught.",
1013                               entry("MSG=%s", e.what()));
1014             freeifaddrs(ifaddr);
1015 
1016             return -EBADMSG;
1017         }
1018         catch (const std::invalid_argument& e)
1019         {
1020             log<level::ERR>("Corrupted config.", entry("MSG=%s", e.what()));
1021             freeifaddrs(ifaddr);
1022             return -EBADMSG;
1023         }
1024     }
1025     freeifaddrs(ifaddr);
1026 
1027     return 0;
1028 }
1029 
1030 int ChannelConfig::readChannelVolatileData()
1031 {
1032     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1033         channelLock{*channelMutex};
1034 
1035     Json data = readJsonFile(channelVolatileDataFilename);
1036     if (data == nullptr)
1037     {
1038         log<level::DEBUG>("Error in opening IPMI Channel data file");
1039         return -EIO;
1040     }
1041     try
1042     {
1043         // Fill in global structure
1044         for (auto it = data.begin(); it != data.end(); ++it)
1045         {
1046             std::string chKey = it.key();
1047             uint8_t chNum = std::stoi(chKey, nullptr, 10);
1048             if (chNum >= maxIpmiChannels)
1049             {
1050                 log<level::DEBUG>(
1051                     "Invalid channel access entry in config file");
1052                 throw std::out_of_range("Out of range - channel number");
1053             }
1054             Json jsonChData = it.value();
1055             if (!jsonChData.is_null())
1056             {
1057                 std::string accModeStr =
1058                     jsonChData[accessModeString].get<std::string>();
1059                 channelData[chNum].chAccess.chVolatileData.accessMode =
1060                     static_cast<uint8_t>(convertToAccessModeIndex(accModeStr));
1061                 channelData[chNum].chAccess.chVolatileData.userAuthDisabled =
1062                     jsonChData[userAuthDisabledString].get<bool>();
1063                 channelData[chNum].chAccess.chVolatileData.perMsgAuthDisabled =
1064                     jsonChData[perMsgAuthDisabledString].get<bool>();
1065                 channelData[chNum].chAccess.chVolatileData.alertingDisabled =
1066                     jsonChData[alertingDisabledString].get<bool>();
1067                 std::string privStr =
1068                     jsonChData[privLimitString].get<std::string>();
1069                 channelData[chNum].chAccess.chVolatileData.privLimit =
1070                     static_cast<uint8_t>(convertToPrivLimitIndex(privStr));
1071             }
1072             else
1073             {
1074                 log<level::ERR>(
1075                     "Invalid/corrupted volatile channel access file",
1076                     entry("FILE=%s", channelVolatileDataFilename));
1077                 throw std::runtime_error(
1078                     "Corrupted volatile channel access file");
1079             }
1080         }
1081     }
1082     catch (const Json::exception& e)
1083     {
1084         log<level::DEBUG>("Json Exception caught.", entry("MSG=%s", e.what()));
1085         throw std::runtime_error("Corrupted volatile channel access file");
1086     }
1087     catch (const std::invalid_argument& e)
1088     {
1089         log<level::ERR>("Corrupted config.", entry("MSG=%s", e.what()));
1090         throw std::runtime_error("Corrupted volatile channel access file");
1091     }
1092 
1093     // Update the timestamp
1094     voltFileLastUpdatedTime = getUpdatedFileTime(channelVolatileDataFilename);
1095     return 0;
1096 }
1097 
1098 int ChannelConfig::readChannelPersistData()
1099 {
1100     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1101         channelLock{*channelMutex};
1102 
1103     Json data = readJsonFile(channelNvDataFilename);
1104     if (data == nullptr)
1105     {
1106         log<level::DEBUG>("Error in opening IPMI Channel data file");
1107         return -EIO;
1108     }
1109     try
1110     {
1111         // Fill in global structure
1112         for (auto it = data.begin(); it != data.end(); ++it)
1113         {
1114             std::string chKey = it.key();
1115             uint8_t chNum = std::stoi(chKey, nullptr, 10);
1116             if (chNum >= maxIpmiChannels)
1117             {
1118                 log<level::DEBUG>(
1119                     "Invalid channel access entry in config file");
1120                 throw std::out_of_range("Out of range - channel number");
1121             }
1122             Json jsonChData = it.value();
1123             if (!jsonChData.is_null())
1124             {
1125                 std::string accModeStr =
1126                     jsonChData[accessModeString].get<std::string>();
1127                 channelData[chNum].chAccess.chNonVolatileData.accessMode =
1128                     static_cast<uint8_t>(convertToAccessModeIndex(accModeStr));
1129                 channelData[chNum].chAccess.chNonVolatileData.userAuthDisabled =
1130                     jsonChData[userAuthDisabledString].get<bool>();
1131                 channelData[chNum]
1132                     .chAccess.chNonVolatileData.perMsgAuthDisabled =
1133                     jsonChData[perMsgAuthDisabledString].get<bool>();
1134                 channelData[chNum].chAccess.chNonVolatileData.alertingDisabled =
1135                     jsonChData[alertingDisabledString].get<bool>();
1136                 std::string privStr =
1137                     jsonChData[privLimitString].get<std::string>();
1138                 channelData[chNum].chAccess.chNonVolatileData.privLimit =
1139                     static_cast<uint8_t>(convertToPrivLimitIndex(privStr));
1140             }
1141             else
1142             {
1143                 log<level::ERR>("Invalid/corrupted nv channel access file",
1144                                 entry("FILE=%s", channelNvDataFilename));
1145                 throw std::runtime_error("Corrupted nv channel access file");
1146             }
1147         }
1148     }
1149     catch (const Json::exception& e)
1150     {
1151         log<level::DEBUG>("Json Exception caught.", entry("MSG=%s", e.what()));
1152         throw std::runtime_error("Corrupted nv channel access file");
1153     }
1154     catch (const std::invalid_argument& e)
1155     {
1156         log<level::ERR>("Corrupted config.", entry("MSG=%s", e.what()));
1157         throw std::runtime_error("Corrupted nv channel access file");
1158     }
1159 
1160     // Update the timestamp
1161     nvFileLastUpdatedTime = getUpdatedFileTime(channelNvDataFilename);
1162     return 0;
1163 }
1164 
1165 int ChannelConfig::writeChannelVolatileData()
1166 {
1167     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1168         channelLock{*channelMutex};
1169     Json outData;
1170 
1171     try
1172     {
1173         for (uint8_t chNum = 0; chNum < maxIpmiChannels; chNum++)
1174         {
1175             if (getChannelSessionSupport(chNum) != EChannelSessSupported::none)
1176             {
1177                 Json jsonObj;
1178                 std::string chKey = std::to_string(chNum);
1179                 std::string accModeStr = convertToAccessModeString(
1180                     channelData[chNum].chAccess.chVolatileData.accessMode);
1181                 jsonObj[accessModeString] = accModeStr;
1182                 jsonObj[userAuthDisabledString] =
1183                     channelData[chNum].chAccess.chVolatileData.userAuthDisabled;
1184                 jsonObj[perMsgAuthDisabledString] =
1185                     channelData[chNum]
1186                         .chAccess.chVolatileData.perMsgAuthDisabled;
1187                 jsonObj[alertingDisabledString] =
1188                     channelData[chNum].chAccess.chVolatileData.alertingDisabled;
1189                 std::string privStr = convertToPrivLimitString(
1190                     channelData[chNum].chAccess.chVolatileData.privLimit);
1191                 jsonObj[privLimitString] = privStr;
1192 
1193                 outData[chKey] = jsonObj;
1194             }
1195         }
1196     }
1197     catch (const std::invalid_argument& e)
1198     {
1199         log<level::ERR>("Corrupted config.", entry("MSG=%s", e.what()));
1200         return -EINVAL;
1201     }
1202 
1203     if (writeJsonFile(channelVolatileDataFilename, outData) != 0)
1204     {
1205         log<level::DEBUG>("Error in write JSON data to file");
1206         return -EIO;
1207     }
1208 
1209     // Update the timestamp
1210     voltFileLastUpdatedTime = getUpdatedFileTime(channelVolatileDataFilename);
1211     return 0;
1212 }
1213 
1214 int ChannelConfig::writeChannelPersistData()
1215 {
1216     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1217         channelLock{*channelMutex};
1218     Json outData;
1219 
1220     try
1221     {
1222         for (uint8_t chNum = 0; chNum < maxIpmiChannels; chNum++)
1223         {
1224             if (getChannelSessionSupport(chNum) != EChannelSessSupported::none)
1225             {
1226                 Json jsonObj;
1227                 std::string chKey = std::to_string(chNum);
1228                 std::string accModeStr = convertToAccessModeString(
1229                     channelData[chNum].chAccess.chNonVolatileData.accessMode);
1230                 jsonObj[accessModeString] = accModeStr;
1231                 jsonObj[userAuthDisabledString] =
1232                     channelData[chNum]
1233                         .chAccess.chNonVolatileData.userAuthDisabled;
1234                 jsonObj[perMsgAuthDisabledString] =
1235                     channelData[chNum]
1236                         .chAccess.chNonVolatileData.perMsgAuthDisabled;
1237                 jsonObj[alertingDisabledString] =
1238                     channelData[chNum]
1239                         .chAccess.chNonVolatileData.alertingDisabled;
1240                 std::string privStr = convertToPrivLimitString(
1241                     channelData[chNum].chAccess.chNonVolatileData.privLimit);
1242                 jsonObj[privLimitString] = privStr;
1243 
1244                 outData[chKey] = jsonObj;
1245             }
1246         }
1247     }
1248     catch (const std::invalid_argument& e)
1249     {
1250         log<level::ERR>("Corrupted config.", entry("MSG=%s", e.what()));
1251         return -EINVAL;
1252     }
1253 
1254     if (writeJsonFile(channelNvDataFilename, outData) != 0)
1255     {
1256         log<level::DEBUG>("Error in write JSON data to file");
1257         return -EIO;
1258     }
1259 
1260     // Update the timestamp
1261     nvFileLastUpdatedTime = getUpdatedFileTime(channelNvDataFilename);
1262     return 0;
1263 }
1264 
1265 int ChannelConfig::checkAndReloadNVData()
1266 {
1267     std::time_t updateTime = getUpdatedFileTime(channelNvDataFilename);
1268     int ret = 0;
1269     if (updateTime != nvFileLastUpdatedTime || updateTime == -EIO)
1270     {
1271         try
1272         {
1273             ret = readChannelPersistData();
1274         }
1275         catch (const std::exception& e)
1276         {
1277             log<level::ERR>("Exception caught in readChannelPersistData.",
1278                             entry("MSG=%s", e.what()));
1279             ret = -EIO;
1280         }
1281     }
1282     return ret;
1283 }
1284 
1285 int ChannelConfig::checkAndReloadVolatileData()
1286 {
1287     std::time_t updateTime = getUpdatedFileTime(channelVolatileDataFilename);
1288     int ret = 0;
1289     if (updateTime != voltFileLastUpdatedTime || updateTime == -EIO)
1290     {
1291         try
1292         {
1293             ret = readChannelVolatileData();
1294         }
1295         catch (const std::exception& e)
1296         {
1297             log<level::ERR>("Exception caught in readChannelVolatileData.",
1298                             entry("MSG=%s", e.what()));
1299             ret = -EIO;
1300         }
1301     }
1302     return ret;
1303 }
1304 
1305 int ChannelConfig::setDbusProperty(const std::string& service,
1306                                    const std::string& objPath,
1307                                    const std::string& interface,
1308                                    const std::string& property,
1309                                    const DbusVariant& value)
1310 {
1311     try
1312     {
1313         auto method = bus.new_method_call(service.c_str(), objPath.c_str(),
1314                                           "org.freedesktop.DBus.Properties",
1315                                           "Set");
1316 
1317         method.append(interface, property, value);
1318 
1319         auto reply = bus.call(method);
1320     }
1321     catch (const sdbusplus::exception_t& e)
1322     {
1323         log<level::DEBUG>("set-property failed",
1324                           entry("SERVICE=%s", service.c_str()),
1325                           entry("OBJPATH=%s", objPath.c_str()),
1326                           entry("INTERFACE=%s", interface.c_str()),
1327                           entry("PROP=%s", property.c_str()));
1328         return -EIO;
1329     }
1330 
1331     return 0;
1332 }
1333 
1334 int ChannelConfig::getDbusProperty(const std::string& service,
1335                                    const std::string& objPath,
1336                                    const std::string& interface,
1337                                    const std::string& property,
1338                                    DbusVariant& value)
1339 {
1340     try
1341     {
1342         auto method = bus.new_method_call(service.c_str(), objPath.c_str(),
1343                                           "org.freedesktop.DBus.Properties",
1344                                           "Get");
1345 
1346         method.append(interface, property);
1347 
1348         auto reply = bus.call(method);
1349         reply.read(value);
1350     }
1351     catch (const sdbusplus::exception_t& e)
1352     {
1353         log<level::DEBUG>("get-property failed",
1354                           entry("SERVICE=%s", service.c_str()),
1355                           entry("OBJPATH=%s", objPath.c_str()),
1356                           entry("INTERFACE=%s", interface.c_str()),
1357                           entry("PROP=%s", property.c_str()));
1358         return -EIO;
1359     }
1360     return 0;
1361 }
1362 
1363 int ChannelConfig::syncNetworkChannelConfig()
1364 {
1365     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1366         channelLock{*channelMutex};
1367     bool isUpdated = false;
1368     for (uint8_t chNum = 0; chNum < maxIpmiChannels; chNum++)
1369     {
1370         if (getChannelSessionSupport(chNum) != EChannelSessSupported::none)
1371         {
1372             std::string intfPrivStr;
1373             uint8_t intfPriv = 0;
1374             try
1375             {
1376                 std::string networkIntfObj =
1377                     std::string(networkIntfObjectBasePath) + "/" +
1378                     channelData[chNum].chName;
1379                 DbusVariant variant;
1380                 if (0 != getDbusProperty(networkIntfServiceName, networkIntfObj,
1381                                          networkChConfigIntfName,
1382                                          privilegePropertyString, variant))
1383                 {
1384                     log<level::DEBUG>("Network interface does not exist",
1385                                       entry("INTERFACE=%s",
1386                                             channelData[chNum].chName.c_str()));
1387                     continue;
1388                 }
1389                 intfPrivStr = std::get<std::string>(variant);
1390                 intfPriv =
1391                     static_cast<uint8_t>(convertToPrivLimitIndex(intfPrivStr));
1392             }
1393             catch (const std::bad_variant_access& e)
1394             {
1395                 log<level::DEBUG>(
1396                     "exception: Network interface does not exist");
1397                 continue;
1398             }
1399             catch (const sdbusplus::exception_t& e)
1400             {
1401                 log<level::DEBUG>(
1402                     "exception: Network interface does not exist");
1403                 continue;
1404             }
1405             catch (const std::invalid_argument& e)
1406             {
1407                 log<level::DEBUG>("exception: Invalid privilege");
1408                 continue;
1409             }
1410 
1411             if (channelData[chNum].chAccess.chNonVolatileData.privLimit !=
1412                 intfPriv)
1413             {
1414                 isUpdated = true;
1415                 channelData[chNum].chAccess.chNonVolatileData.privLimit =
1416                     intfPriv;
1417                 channelData[chNum].chAccess.chVolatileData.privLimit = intfPriv;
1418             }
1419         }
1420     }
1421 
1422     if (isUpdated)
1423     {
1424         // Write persistent data to file
1425         if (writeChannelPersistData() != 0)
1426         {
1427             log<level::DEBUG>("Failed to update the persistent data file");
1428             return -EIO;
1429         }
1430         // Write Volatile data to file
1431         if (writeChannelVolatileData() != 0)
1432         {
1433             log<level::DEBUG>("Failed to update the channel volatile data");
1434             return -EIO;
1435         }
1436     }
1437 
1438     return 0;
1439 }
1440 
1441 void ChannelConfig::initChannelPersistData()
1442 {
1443     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1444         channelLock{*channelMutex};
1445 
1446     /* Always read the channel config */
1447     if (loadChannelConfig() != 0)
1448     {
1449         log<level::ERR>("Failed to read channel config file");
1450         throw std::ios_base::failure("Failed to load channel configuration");
1451     }
1452 
1453     /* Populate the channel persist data */
1454     if (readChannelPersistData() != 0)
1455     {
1456         // Copy default NV data to RW location
1457         std::filesystem::copy_file(channelAccessDefaultFilename,
1458                                    channelNvDataFilename);
1459 
1460         // Load the channel access NV data
1461         if (readChannelPersistData() != 0)
1462         {
1463             log<level::ERR>("Failed to read channel access NV data");
1464             throw std::ios_base::failure(
1465                 "Failed to read channel access NV configuration");
1466         }
1467     }
1468 
1469     // First check the volatile data file
1470     // If not present, load the default values
1471     if (readChannelVolatileData() != 0)
1472     {
1473         // Copy default volatile data to temporary location
1474         // NV file(channelNvDataFilename) must have created by now.
1475         std::filesystem::copy_file(channelNvDataFilename,
1476                                    channelVolatileDataFilename);
1477 
1478         // Load the channel access volatile data
1479         if (readChannelVolatileData() != 0)
1480         {
1481             log<level::ERR>("Failed to read channel access volatile data");
1482             throw std::ios_base::failure(
1483                 "Failed to read channel access volatile configuration");
1484         }
1485     }
1486 
1487     // Synchronize the channel config(priv) with network channel
1488     // configuration(priv) over dbus
1489     if (syncNetworkChannelConfig() != 0)
1490     {
1491         log<level::ERR>(
1492             "Failed to synchronize data with network channel config over dbus");
1493         throw std::ios_base::failure(
1494             "Failed to synchronize data with network channel config over dbus");
1495     }
1496 
1497     log<level::DEBUG>("Successfully completed channel data initialization.");
1498     return;
1499 }
1500 
1501 } // namespace ipmi
1502